GHSA-72m5-fvvv-55m6

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    GHSA-72m5-fvvv-55m6

    Published: 22 Apr 2021Last Modified: 17 Jul 2025

    Summary: Observable Differences in Behavior to Error Inputs in Bouncy Castle

    Details: In Legion of the Bouncy Castle BC before 1.55 and BC-FJA before 1.0.2, attackers can obtain sensitive information about a private exponent because of Observable Differences in Behavior to Error Inputs. This occurs in org.bouncycastle.crypto.encodings.OAEPEncoding. Sending invalid ciphertext that decrypts to a short payload in the OAEP Decoder could result in the throwing of an early exception, potentially leaking some information about the private exponent of the RSA private key performing the encryption.

    References: https://nvd.nist.gov/vuln/detail/CVE-2020-26939, https://github.com/bcgit/bc-java/commit/930f8b274c4f1f3a46e68b5441f1e7fadb57e8c1, https://github.com/bcgit/bc-java/wiki/CVE-2020-26939, https://lists.apache.org/thread.html/r8c36ba34e80e05eecb1f80071cc834d705616f315b634ec0c7d8f42e%40%3Cissues.solr.apache.org%3E, https://lists.apache.org/thread.html/r8c36ba34e80e05eecb1f80071cc834d705616f315b634ec0c7d8f42e@%3Cissues.solr.apache.org%3E, https://lists.debian.org/debian-lts-announce/2020/11/msg00007.html, https://security.netapp.com/advisory/ntap-20201202-0005

    Affected packages

    Package

    Name: org.bouncycastle:bcprov-jdk14

    Purl: pkg:maven/org.bouncycastle/bcprov-jdk14

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.61

    Affected versions

    1.38

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    GHSA-72m5-fvvv-55m6 | CVE-DB